Spray heads for use with desuperheaters and desuperheaters including such spray heads

A desuperheater, comprising:

• a desuperheater body;
• and
• a spray head coupled to the desuperheater body, the spray head comprising:
• a main body having an outer wall and an inner wall spaced radially inwardly of the outer wall, the inner wall defining a central passage, the main body adapted for connection to a source of fluid;
• at least one entrance port formed in the main body along the central passage;
• at least one spray nozzle arranged adjacent the outer wall of the main body, the spray nozzle having at least one exit opening;
• and
• a plurality of flow passages, each of the plurality of flow passages providing fluid communication between the entrance port and the exit opening of the spray nozzle,
• wherein a first one of the plurality of flow passages follows a first non-linear path and a second one of the plurality of flow passages follows a second non-linear path, and
• wherein at least a portion of each of the plurality of flow passages is disposed radially outwardly of the outer wall.

A method of manufacturing, comprising:

• creating a spray head for a desuperheater using an additive manufacturing technique, the creating comprising:
• forming a main body of the spray head having an outer wall and an inner wall spaced radially inwardly of the outer wall, the inner wall defining a central passage, the main body adapted for connection to a source of fluid;
• forming at least one entrance port in the main body along the central passage;
• forming at least one spray nozzle arranged adjacent the outer wall of the main body, the spray nozzle having at least one exit opening;
• and
• forming a plurality of flow passages that provide fluid communication between the entrance port and the exit opening of the spray nozzle, wherein a first one of the plurality of flow passages follows a first non-linear path, wherein a second one of the plurality of flow passages follows a second non-linear path, and wherein at least a portion of each of the plurality of flow passages is disposed radially outwardly of the outer wall.